Audio device and audio system

Abstract

An audio device includes: a reproduction unit that reproduces an audio signal of a plurality of channels; an input unit that receives a detection signal indicating the positions of the reproduction unit and a listener; and a control unit that changes the audio signal to be reproduced by the reproduction unit depending on the position based on the detection signal.

1 . An audio device comprising:
 a reproduction unit that reproduces an audio signal of a plurality of channels;   an input unit that receives a detection signal indicating the positions of the reproduction unit and a listener; and   a control unit that changes the audio signal to be reproduced by the reproduction unit depending on the position based on the detection signal.   
     
     
         2 . The audio device according to  claim 1 , wherein the control unit calculates a target value of a level and/or an amount of delay of the audio signal on the basis of the position and changes the level and/or the amount of delay of the audio signal using a difference between the target value and a current value as an amount of adjustment. 
     
     
         3 . The audio device according to  claim 1 , wherein the control unit divides the amount of adjustment into smaller steps and changes the audio signal by the steps. 
     
     
         4 . The audio device according to  claim 1 , wherein the control unit changes the audio signal to be reproduced depending on the positions based on centers of gravity of the positions of a plurality of listeners. 
     
     
         5 . The audio device according to  claim 1 , wherein the control unit clears the amount of adjustment when information indicating that no listener is detected is not received continuously by a prescribed number of times. 
     
     
         6 . An audio system comprising:
 a sensor that detects a position of a listener;   a position detecting unit that processes output of the sensor and outputs a detection signal indicating the position;   a reproduction unit that reproduces an audio signal of a plurality of channels;   an input unit that receives the detection signal from the position detecting unit; and   a control unit that changes the audio signal to be reproduced by the reproduction unit depending on the position based on the detection signal.   
     
     
         7 . The audio system according to  claim 6 , wherein the position detecting unit is constructed by an imaging unit disposed in a video display device located almost at the same position as the reproduction unit.